During April 2025, this developer contributed to the grafana/k6-DefinitelyTyped repository by adding TypeScript type definitions for the Leaflet ChinaTMSProviders plugin. They authored an index.d.ts file to provide official typings, improving type safety and developer experience for TypeScript users working with Leaflet. To ensure correctness, they implemented a usage test that verifies the typings in practical scenarios. Additionally, they introduced an npmignore file to streamline package publishing and reduce unnecessary files in the published package. Their work demonstrated a solid understanding of DefinitelyTyped conventions, TypeScript, and Leaflet, delivering a focused and well-structured feature within a short timeframe.